Ingredients

• 1 cup chopped onion
• 1 cup chopped green pepper
• 1 tablespoon butter
• 1 (28 ounce) can tomatoes, cut up,don't drain
• 1 (4 ounce) can mushroom pieces
• 1 (2 ounce) can sliced ripe olives
• 2 teaspoons oregano
• 1 lb ground beef, brown and drain
• 10 ounces spaghetti, cooked and drained
• 2 cups shredded cheddar cheese
• 1 (10 ounce) can cream of mushroom soup
• 1/4 cup water
• 1/4 cup grated parmesan cheese